Improvement in geographical clocks



s. .T.-WALLACE.

GEOGRAPHICAL CLOCK. No.170,Z1Z. Patented Nov. 23,1876.

UNITED STATES P TE T OFFICE.

SAMUEL JAooB WALLAcE, on KEOKUK, row

IMPROVEMENT IN GEbGRAPHlCAL CLOCKS.

Specification forming part of Letters Patent No. 170,2 [2, datedNovember 23, 1875 application filed September 29, l8?3 To all whom itmay concern:

Be it known that I, SAMUEL JAcoB WAL- LACE, of Keokuk, Lee county, Iowa,have made an Invention in Watches and Time- Keepers, of which thefollowing is a specification:

The object of this invention is to enable watches, clocks, andtime-indicators to show on their faces, by means readily applicable toall, the time of different places, as where connecting railways, 850.,use different standards of time. It is made substantially as set forthhereinafter, referring to the accompanying drawings, in which Figure3iscross-section of a portion of Figs. 1 and 2 which show dial-faces, onewith the hourhands, and the other with the minute-hands.

The dial-face A has the ordinary or any suitable graduation of hours.The center spindle B is made in the usual or any suitable way forbearing hour and minute hands. The

hour-hands (J are shown in Fig. 2, and minutehands in Fig. 1, forclearness. Each has a central disk fitted to its portion of thebearing-spindle, in the usual way; and each has a main pointer, E E,larger than the others, to keep a standard time which may be commonthroughout each country or large portion of the earth, as Washingtontime in the United States of America, and which may be readilyobtainable everywhere by telegraph for correction. Each central disk 0 Dalso bears any suitable number of additional pointers,.G H I K L M N OP, fixed in the same plane at distances from each other 'around thecircle such as to show the relative time at the several places desired.These are made to be distinguished from each other by different colors.The hour-hands are made of bright colors, as red, gold, and silvercolors, and various shades. The minute-hands are made with dark colors,as black, blue, and green, and various shades for distinction. They arealso made with initial letters for the places designed for, or with anysuitable emblems, or with the names. These disks, with sets of pointers,are formed by being cut by stamping out of sheet metal, and the severalpoints colored suitably, and may be kept in stock for sale. When theyare applied to use, any of the points not desired can be clipped off,thus forming an improved article of manufacture and sale. If the pointsas so made on the article should not include ones in the exact positiondesired, one may be bent into place from one side. To strengthen theseparate points and keep them in the same plane, so as not to interferein moving round, they are connected by part S from one to another, whichalso keeps them in their fixed relation, so that, when the standardpoints are placed right, all the others must be right. With theminute-hands, this part S forms an entire circle, holding all in place,and effectually preventing interference with. the hour hands. To

down a little toward the hour-hands below the plane of the hands orpointers on it, so the circle may rub continuously if any hour-pointsshould by accident be inclined to interfere. The hour-points are bent alittle up at this place in their length, so as to prevent contact at anyother place. The circle S has holes in it by which a broader localtime-point can be riveted on; or may be screwed on, so as to bechangeable for distant travelers who wish to vary their local indicatorWithout changing or losing their standard time. The long flexiblepointer T may be riveted to disk D, so as to bend around to show localtime; or it may be fixed on a secondary disk borne by, but movable on,the same spindle, or on a circular shoulder, U, raised on disk D. Theminutepointers are arranged to show the exact time at each place, andthe hour-pointers maybe the same, or may be placed at hour distancesapart, two, three, or more, sufficient for the territory desired, andmarking these points fifteen degrees apart, it being easy to noticewhich point stands for the nearest hour meridian to indicate the numberof the hour the minute-hand is pointing out.

Either set of pointers may be used along with single ordinary hands, andvarious modifications can be used in the shape of the hands, their size,length, colors, and ornaments to distinguish them apart, and some may bemade with portions of different colors. The colors may be given bycoating with difi'crent metals, as gold, nickel, copper-gem, by batteryor otherwise, or by painting.

The center part fitting on the shaft may be make this more certain, thiscircle is bent made thicker than the hands. For this the sheet metal isfinished by running between rollers having suitable grooves to leave thesheet thicker in the line Where the line of centers will come in cuttingout.

The movable pointer T can be used as a special time-indicator forvarious purposes, without interfering with the regular running hands inthis way: at the moment of starting, this hand can be turned to twelveand let run, when it will show the exact time of running from that. Ifit is desired to stop at the end of a course to leave a record of time,this hand may be set on. a separate portion of the shaft or otherwise,and arranged so as to be thrown into or out of gear whenever desired.The hour-hands may also be provided with a movable hand when required,and in this case it could be arranged to actuate an alarm apparatus.

I claim- 1. The multiple-pointed'index for time-indicators, having oneof the points moving together made separate, so that it may be changedand set to show any local time without interfering with the regularindications of the remainder of the points, substantially as set forth.

2. The disks G, with radiating indioes and perforated centers,substantially as set forth.

SAMUEL JACOB WALLACE.

Witnesses:

W. J. OOCHRAN, A. HOLLAND.

